Both Chase Headley and Carlos Quentin are out of the lineup Saturday against the Dodgers, meaning the Padres will, for the second time in as many days, have to do without their typical Nos. 3 and 4 hitters as they go for their fourth straight win.

Headley received an epidural injection Friday night to alleviate back pain from a herniated disc. The third baseman is expected to avoid a DL stint.

Quentin, who did not start Friday because of a sore left knee, did enter that game to deliver a pinch-hit, RBI double. He will again be available in that capacity.

In left field, Jake Goebbert is getting his first big-league start. Friday, Goebbert lined a run-scoring single in his first at-bat in the majors.

With Yonder Alonso on the DL and Headley sidelined for at least two more days, the Padres' infield depth is precarious. Tommy Medica is starting at first, Jace Peterson at second, Everth Cabrera at shortstop and Alexi Amarista at third.

Rene Rivera is starting behind the plate, meaning that the team's other catcher, Yasmani Grandal, would likely be called upon should a need arise in the infield. Padres manager Bud Black also mentioned outfielder Chris Denorfia, who had limited infield experience while at Wheaton College, as an emergency option.

Gwynn service

A private memorial service was held for Tony Gwynn on the campus of San Diego State earlier Saturday. The attendees included Black, Barry Bonds, Rod Carew, Tony Clark, Adrian Gonzalez, Trevor Hoffman, John Kruk, Ozzie Smith, Dave Winfield and members of the Padres' ownership group.

"It was emotional," Black said. "I thought it was well done."

A public memorial will follow Thursday at Petco Park. The service is scheduled to begin at 7:19 p.m.